25144969 has 2 divisors, whose sum is σ = 25144970. Its totient is φ = 25144968.

The previous prime is 25144927. The next prime is 25144991. The reversal of 25144969 is 96944152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24800400 + 344569 = 4980^2 + 587^2 .

It is a cyclic number.

It is not a de Polignac number, because 25144969 - 2⁷ = 25144841 is a prime.

It is a super-2 number, since 2×25144969² = 1264538932021922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25144909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12572484 + 12572485.

It is an arithmetic number, because the mean of its divisors is an integer number (12572485).

Almost surely, 2^25144969 is an apocalyptic number.

It is an amenable number.

25144969 is a deficient number, since it is larger than the sum of its proper divisors (1).

25144969 is an equidigital number, since it uses as much as digits as its factorization.

25144969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 25144969 is about 5014.4759447025. The cubic root of 25144969 is about 292.9658740982.

The spelling of 25144969 in words is "twenty-five million, one hundred forty-four thousand, nine hundred sixty-nine".